Answer

The MacBook Pro 2015 Models would have the RAM (Memory) soldered to the motherboard to provide a fas
The MacBook Pro 2015 Models would have the RAM (Memory) soldered to the motherboard to provide a faster experience. This also ensures no moving parts. With this upgrade they made this doesn't allow you to add memory post purchase. So this Memory Module would not be for this model. Sorry.

Answer

The 2012 Mac Mini will recognize the modules and run with them installed, but will only run them at
The 2012 Mac Mini will recognize the modules and run with them installed, but will only run them at 1600 MHz due to the way the system's EFI is written. Beyond that...the extremely modest performance increase you'd achieve moving from 1600MHz to 1867MH is so negligible as to be almost irrelevant.